Lock



Patented May 31, 1932 UNITED STATES PATENT orI-icr:

MAURICE SAMBURG, OF BROOKLYN, NEW YORK, AS SIGNOR TO LOCK PATENTS HOLD- IN G CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK' LOOK Application filed November 2,1928. Serial No. 316,746.

This invention relates to lock construction. One'object of the invention is to provide a jimmyproof latch-lock which may be easily and eifectively operated for locking a door or the like by simply slamming or moving the door shut and without the necessity of actuating a knob or key, or similardevice.

Among the objects of this invention is to provide a compact and rugged lockof the character described which shall comprise few and simple parts, which'shall be inexpensive of manufacture and which shall yetbe positive, practical and eflicient to a high degree in use.

Other objects of this invention will in part beobviousand in part hereinafter pointe out. I

The invention accordingly consists inthe features of construction, combinations of ele- 2o merits, and arrangement of parts which will be exemplified in the construction hereinafter described, and of which the scope of application will be indicated in the following claims.

is shown oneof the various possible illustra-tive embodiments of this'invention.

Fig. 1 is a front View of a portion of a door and jamb with the lock embodying the invention and the keeper therefor attached to said door and amb respectively, parts of said lock and keeper being broken away to show the interior construction. 2 I

Fig. 2 is a cross-sectional view of the lock and door, taken on line 2-2 of Fig.

Fig. 3 is a cross-sectional view taken on line 33 of Fig. 2; I

Fig. 4 is a view similar to Fig. 3 with the pivoted bolts shown in retracted position.

Fig. 5 is a view similar to Fig. 3 showing the pivoted bolts and the latch bolt retracted.

Referring in detail to the drawings, 10 designates part of a door to which the lock 11, embodying the invention, is attached, and 12 designates part of a door jamb to which is attached a keeper 13,'cooperating with said lock. The lock 11 comprises a casing 14 provided with a front face 15, a top wall 16, a bottom wall 17, and end walls 18 and 19.

Walls 20 and 21 connect end wall 18 with In the accompanying drawings, in which walls 16 and 17 respectively. The end wall 19 of said casing is provided with ledge-portion 22 received in a cut out portion 23 in the permitting the bolting mechanism 29 within.

the casing to extend thru said wall 19.

The keeper 13 is secured to the door jamb 12 by screws 30 extending through ears 31 preferably integrally formed with said keeper. Said keeper is provided with the usual.

opening 33 for receiving the bolting mechanism protruding thru the openings 28 in the casing 14.

The casing 14 is provided with guiding and positioning means for the bolting mechanism 29. To this end walls 16 and 17 are provided with aligned bosses 16a, 17 a respectively, said bosses terminating short of the open end 35 of the casing and providing shoulders 16?), 17b respectively. Said bosses are formed with axial screw threaded openings 36. A plate 37, substantially fitting the inner contour of the casing, is mounted within casing 14, said plate resting on shoulders 16b, 17 b and being secured to said bosses 16a, 17a as by screws 38 received in said openings 36;

A pair of guide members 40,41 are secured to walls 16 and 17 respectively of said casing. Said members are provided with a portion 42 abutting the'inner surfaceof the casing wall, between bosses 16a, 17 a respectively and the front wall 19, and substantially of the height of said bosses to provide additional support for said plate 37. Said guide members 40, 41 are each provided with ramp porwith undercut portions 44 adjacent the wall 15 of the casing for the purpose hereinafter explained. Obviously said members 40, 41

. may be formed integrally with said casing The bolting mechanism 29 comprises a latch door to aid in positioning the lock. The cas- I between the plate 37 and wall 15 of the cas- I spring 67.

ing. Said latch bolt is provided with the usual ramped portion 51 having an outer edge 52. The surface of the bolt adjacent said edge 51 is recessed as at 53 to form aligned side walls 54 spaced from the end wall 56 of said recess, an opposite end wall 57, and a side wall 58 extending from said end wall 57. The/opposite surface 59 of the bolt is also recessed-as at 60, thus forming an end wall 61."

Said latch bolt 50 is provided with aligned ears 62 extending outwardly from opposite Pins 62a side portions 63, 63a of the bolt. secured to ears 62 in alignment with said side portions, extend upwardly therefrom and form pivots for a pair of bolts 64, mounted on said pins 62a for pivotal movement in said races 53. Each of said bolts 64 is provided with a hook portion 65 adapted to extend through the space 66 between side wall 54 and end wall 56 during outward pivotal movement of said bolt. The bolts 64 are normally maintained in outwardly pivoted position (see Fig. 3) by a light blade spring 67 firmly secured at its mid-portion 68 between projections 6970 integrally formed with said latch bolt 50. The end portions 71 of said spring bear on the hook ends 65 of said bolts 64. I 1

Means is provided for rotating said bolts 64 inwardly against the pressure of said To this end, each of said bolts 64 is fonned with curved projections 72 adjacent the pivoted end of said bolts. A plate 73 is mounted in recess 53 adjacent end wall 57, and is provided with oppositely curved hook portions 74 slidably engaging said curved projections 72. Pins 75 secured to said plate 73 are slidably received in parallel slots 76 extending thru said bolt 50. Each of said pins 75 is rigidly attached at its opposite end v 77 to a plate 78 slidably mounted in recess 59 in the opposite surface 60 of said latch bolt. Said plate 73 is formed with an outstanding ledge 80 adjacent one end thereof, a portion of said ledge extending beyond the side of said bolt 50.

A cover plate 81 is secured to said bolt,50. Said plate abuts wall 56 at one edge and rests upon walls'54, 57 and 58 on projections 69, 70, and is provided with apertu'red ears 83 for receiving said pins 62a. Said plate may be secured to said bolt 50 by screws 84 received in threaded openings 85 in end wall 57 and in projection 69. The plate 81 is further formed with a cut-out portion 86 to permit the ledge 80 to extend beyond said from either inside or outside the door.

wall 15 of the casing 14 is provided with a short post 85 on which is mounted a strong coiled spring 86 having one arm 87 pressing against wall 17 of the casing and another arm 87a engaging a. pin 88 projecting from said cover plate .81. Said arm 87 of the spring 86 exerts a strong pressure on said pin 88 to force the latch lock outwardly into the opening 33 of the keeper 13 to normally maintain the door in locked condition.

It will be noted that in this locked position the hook ends 65 of the pivoted bolts 64 engage the inner surface of wall 32 of said keeper 13 thus rendering the lock jimmyproof, that is, the door 11 cannot be moved away from the door jamb 12 by the manip-- ulation of a jimmy inserted in the crack between said door and jamb, since such movement is prevented by the pivoted bolts 64.

Means are provided for opening the lo p k 0 this end the front wall 15 of the casing is formed with a boss 90 bored, as at 91, to receive the usual shaft 92 secured to the knob 93., Said shaft 392 extends into said casing 14 and is secured to an arm 94 disposed adjacent said ledge 80. Rotation of the knob 93 in a counterclockwise direction will cause the end portion 95 of said arm 94 to press against the ledge 80 and move plate 73 to the right. The first part of thiscounterclockwise rotation is resisted by spring 67 while the pivoted bolts are drawn inwardly. (See Fig. 4.) Further rotation of said knob will move the latch 50 (with the pivoted bolts 64 in retracted position), into the casing 14,- against the tension of spring 86. (See Fig. 5.) I

The same opening movement may be accomplished bya key (not shown) actuating an arm 96 pivoted in plate 37, against ledge 98 formed on plate 78. Since the latter is rigidly "secured to plate 73 thru pins 75, actuation of one of said plates will move the other.

- Release of the key, or knob 93 will permit the springs 86, 67 to act on bolts 50, 64 to automatically lock the door.

A dominant feature of the invention is that it eliminates the necessity for actuating the knob or using a key for locking the door. Thus it will be noted that when the door is open, it need only be slammed the same as any door provided with the usual latch lock.

When the ramped portion 51 of the bolt 50 strikes the edge of the keeper plate on slam-. ming the door, said bolt will be forced inwardly. During this movement of the bolt. the hook portions 65 of the pivoted bolts 64 ride on the ramped portions 43 of the guides 40, 41 and are thus forced inwardly. As

soon asedge 52 of the latch bolt enters the opening '33 in the keeper, the springs 86, 87 will automatically force the bolts 50, 64 outwardly into locking position.

The undercut grooves 43' formed in the guides 4O, 41 slidably receive ears 62 and 83 and the interposed portions of the bolts 64C duringreciprocation of the bolt 50.

It will thus be seen that there is provided a device in which the several objects of this invention are achieved, and which is well adapted to meet the conditions of practical use.

As various possible embodiments might be made of the above invention, and as various changes might be made in the embodiment set forth, it is to be understood that all matter herein set forth or shown in the accompanying drawings is to be interpreted as illustrative and not in a limiting sense.

Having thus described my invention I claim as new and desire to secure by Letters 7 Patent 1. In a lock, in combination with a keeper secured to a door jalnb and a casing secured to a door, a latch bolt having a ramped portion mounted for reciprocation within said casing,'and a bolt pivoted to said latch bolt, said casing having a fixed portion contacting said pivoted bolt to cause rotation thereof, when the ramped portion of said latch bolt is repressed by striking said keeper upon slamming the door.

2. In a look, a casing, a latch bolt mounted for reciprocation therein, a relatively strong spring normally maintaining said bolt in locking position, a bolt pivotally mounted on said latch bolt, a relatively light spring pressing against said pivoted bolt normally maintaining the same in looking position and means for successively moving said pivoted bolt and latch bolt to releasing position, said means including a member having a hook portion engaging said pivoted bolt and mounted for limited sliding movement with respect to said latch bolt.

3. In a look, a casing, a bolt mounted in said casing, a second bolt mounted for pivotal adapted to extend beyond said first mentioned bolt, said pivoted bolt having a portion adapted to extend beyond said first mentioned bolt, resilient means normally maintaining said pivoted bolt in said extended position,

and means fixed to said casing adapted for coaction with said extended portion to rotate said pivoted bolt against the tension of said resilient means upon movement of said first mentioned bolt.

4. In a. lock, in combination with a keeper secured to a door jamb and a casing secured to a door, a latch bolt having a ramped portion mounted for reciprocation on said casing, a second bolt pivotally mounted on said latch bolt, and means for successively moving said bolts to releasing position, said casing having a ramped portion cooperating with said pivoted bolt to cause rotation thereof upon slamming the door.

5. In a lock, a casing secured to a door, a

latch bolt mounted for reciprocation therein,

a relatively strong spring normally main- 

